Which of the following statements about the effect of surface area and volumv96q4isfwwc; e onwvsqifc 9;4w 6 the cell’s processes is false?

  Which statement best d rw;j 7k(gr;wocx1ka 4escribes stem cells?

  Which is a correct description of the cell type adapted for gasih p:. 1dzi*fr exchange in the lfidpz :r.i* 1hungs?

  Which of the following explains the limitations qyd*6/n:xm6 b+xrfgu on cell size?

  What is this cell's most lx /j3t6)d8 sflnv,d diikely primary function, and where could it be located in a mammalfxjs6id3t, )l8 /dd vn?

  Which of the following characterifhh ual,2c8d /stics of type I pneumocytes contribute to increasing the rate o ,dh8/hu2flac f gas exchange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone mar j/c1uvp+5ucczmk6j*7 drnwzh0co * 0 row transplant from a 36 year old. One of the functions of these cells is to produce red and white blood cells. What type of stem cells h1zkuwn zdp/rchjc 0uv+c0*o56jc* m7 as the patient received?

  Based on the Venn diagram, which id ()l 4qdfr(if/z3icq/i/v rlpk+9r mjentifies cardiac muscle cells and striated muscle fibrefickqd j(l/f4m/9zi +l rr p/ vir)q(3s?

Below is a diagram of 7t+.kayz 9b aoi*nw3f a motor neuron. Neurons are the longest cells in the human aa3 *yknfwt 97i.boz+body.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infant respiratory distress syndrr+hmxaz (w:po t7 h-u8ome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two diffhxhwmp8-7+ ao z rt(:uerent alveoli structures.


1.Describe one feature of the surfactant.

2.Suggest a treatment for infant respiratory distress syndrome.

3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.

  Which of the following is a reason that embryonic stem (ieotm+jrf,qv/h g.p*5 ull1 cells are not used in the treatmf. uo5pe,/mi1ql*rt( hlg+jvent of leukaemia?

  The table shows the diameters of red blood cells from differens n31 hkpr92xq *dfb)ot organisms. Which red blood cell will have the highest surface area to vqnx* 2s1o fdk9h3brp)olume ratio?

1.Explain how the shape x5g;oxj2 if+ nof erythrocytes and cells lining the proximal convoluted tubule make these cells more adapted toxi xj25n;+gof the functions they perform.

2.Compare and contrast the structure of striated muscle cells and cardiac muscle fibres.

3.Explain how the structure of egg and sperm cells are adapted to their functions.

  Which statements about embryonic stem cells:o5i h)a*r2y hiueo7rg0x2b b and specialised cells is/are not true*:ihou0hrer o)b xib5a7g y22 ?

I. Embryonic stem cells have higher levels of DNA methylation than differentiated cells
II. Specialised cells are more differentiated than embryonic stem cells
III. Most specialised cells and embryonic stem cells both contain the entire genome of an organism

  In humans, which of the following is the correct order from smallest-/7tfb vpq3cr to largest?qrp3 7tc v-b/f

  Which row in the following table gives the correct ;r4u88 uxt toadisadvantages of the different stem cell sou8; ouxua8r t4trces for therapeutic uses?

1.Describe how the use of stem cells may be used to treat tye82m pz, zw-kkz,xe ow ;ln64ipe I diabetes in the futu ;io6l2kw-wx mze, ,kpznz8e4re.

2.Explain the factors that limit cell size in humans.

3.Explain how red blood cells and striated muscle fibres are adapted to their function.

Below are diagrams of specialised cells pn kxm)56n30sn o jz2w-:je ww(not to scale).

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.